Network Security Engineer

NorthMark Strategies•Dallas, TX

12d

About The Position

The Network Security Engineer is a hands-on technical role within NorthMark Compute & Cloud (NMC²)’s centralized Security Engineering organization, responsible for designing and maintaining the network security infrastructure that protects our hyperscale HPC and cloud compute environment. This role plays a direct part in building the controls, automation, and operational practices that keep NMC²’s infrastructure secure at scale. You would be responsible for designing, implementing, and maintaining the organization's network security architecture and controls. Reporting to the Manager of Network and Infrastructure Security, this role serves as a technical subject matter expert for network security, driving initiatives that protect the organization's infrastructure from internal and external threats. The ideal candidate combines deep technical expertise with a collaborative mindset and a proactive approach to identifying and mitigating risk.

Requirements

5+ years of experience in network security engineering, with hands-on experience across trusted, untrusted, and DMZ environments
Strong understanding of network protocols and the OSI model, with practical experience in TCP/UDP-based applications, routing, switching, and load balancing
Experience securing both on-premises and cloud network environments (AWS, Azure, or GCP)
Solid knowledge of network security technologies including firewalls, VPNs, proxies, MACsec, IPsec, HTTPS, certificate chains, DNS, NTP, AAA, and domain-based authentication and authorization
Experience with one or more leading security vendors such as Palo Alto, Fortinet, Check Point, or F5
Familiarity with Zero Trust principles, network segmentation, and secure cloud networking in AWS or Azure
Hands-on experience with scripting and automation using Python, Ansible, or Terraform
Excellent communication skills with the ability to document technical findings and present recommendations to both technical and non-technical audiences
Must be legally authorized to work in the United States without the need for employer sponsorship, now or at any time in the future.

Nice To Haves

Experience with VxLAN EVPN data center architecture
Background in SOC operations or working with MSSPs
Firewall automation experience

Responsibilities

Design, implement, and maintain network security architecture including firewalls, IDS/IPS, VPNs, and related controls across on-premises and cloud environments
Serve as the team's primary subject matter expert for network security technologies, providing guidance and technical direction on complex security challenges
Evaluate and recommend new network security technologies and solutions to continuously improve the organization's security posture
Collaborate with infrastructure, cloud, and IT operations teams to ensure network security controls are integrated into new and existing environments
Monitor network security events and alerts, investigate anomalies, and lead response efforts for network-based threats
Develop and maintain network security standards, policies, and technical documentation
Support network segmentation and micro-segmentation efforts by providing technical expertise on traffic flows, access controls, and policy enforcement
Participate in security architecture reviews for new projects, systems, and third-party integrations to ensure network security requirements are addressed
Mentor junior security engineers and contribute to the overall growth and development of the network security team